Fuse-spitter.



F. BERNARDI.

ruse sP|TE|L` vAPPLICATIQN FILED APR. Il, 1916.`

1,218,512. Ptented Mar. 6,1917. K

` WITNESSES:

mr mmm: Ferns cu.. rnormurno.. vusumc:

i j .s-rrrtrnnco.,OFMOKELUMNEHILL, cairirroiiivian yuseful )Improvements flu-sefSpitters, lof

UNITED STATES l AFRANK BERNARDLor srocicmoiv, .carino y' vTo yall whom may concern: .l

:Be vit knownfthat 1 ,ERANK BERNARD, a

citizen of 'the-.United fStates,residing"at nStockton, inf the countyf'o-fffSan Joaquinand V'State o'f' California, shave :invented inewi and l YWhichrthe following is--ia"specific-atien.'

, sivelchiargesz useddnfmining orf'blasting operations, it iis; common :practice g to :connect th'e i vr I' is'i'electri'cally or .otherwise `iignitedlat .the

charge with one end of apowder fuse which A opposite=end-V yItsometimes?happensthat careless handling-off the .ffu'seV causes" so :.much

POwder ..to ifall rout (of i'theend Yof fthe `fuse that; the intervalfoftime alloted Lforgburnff isredueedpand talsotliatitheffinal spit- .ti-ng action willinoti'havesuflcientifiash or *force ito iignite ,the fchaige, therebyfcausing 'either fan '..foverlappin'g Yfof-shots ,1 or .da l 'inisfirev withV connected dangers,=etc'.

:rile objeta-@fiale represent invent-ien. me' vprovide .meansfor preventing anyfpowder.

.from fallingy out of the spitting 'fend' lo-f the .fuse andfalso togprovide a means for intensifying "the flashing or spitting force of the fuse. i

v Further objects will hereinafterv-appear. The invention consistsofith'e parts and the construction and combination of partsV as Ihereinafter Amore Jfully"described and f claimed, having reference to the accompanyf the end of therfuse and the semi-sliiliericalk fing drawings in which*V Figure l is a side elevation showing the an. electrical fuse spitter. Y Y

.'Fig. 2 is an enlarged, longitudinal section application of the invention to the end of 40.

l ofthe end of theV fuse.

:Referring to the drawings in detaiL-A "-ai'ndicates asection ofV anV ordinary black v45.

to which is connected by means of the wires 8 4'with a source of electric currentV supplyA .not here shown.' Mounted-interio'rly of the ,cap .2 is apair of terminal Ymembersvvith which the wire-SB connect and a priming'V powdered fuse; 2 a metal cap attached therecharge of powder which connects with'the v`powdertrain interior of the fuserA. VThe .construction ofV the cap, together with the 1 electrical connections and manner of attache ing same to the fuse does not formany part of the present invention as it is fully illus- 'specification pf Letters Patent.

fignitiing; lthe explo-V I the end of the fuse-until j end thereofor may be formed Vend of vthe fusel into black and' when hardened of powder from the charge .CORPORATION- oFpaLrFoRivrA; 'Y

ruary 28, 1909. Electrical fuse spitters for .the 4purpose of tion with mining andblasting opera-tions and :it `often 'happens that the -careless handling of tthe fuse. .end permits so :much

Y, y Y :Patenteoriginar.6,1912?.v 'Arrucatioanied Manara-16. jserialfivofgliss'.

trated iin my former vpatent, *"No. 5913,56@ p Y i entitled Electricalzfusespitterwissued lieb ofethe powder in :the spittingendkof :the

' fuse to :fall ontthat ithe ztimeof Alnirning is reduced and Voftentlie final spittingiacl Y" tionl is entirely lost or :theflashingiforce Y Y isfso weakened that ignition:-ofgtlieiexplosive .powder er dynamite chargeis` prevented,

Vthus causing which not sometimes -accidentally chargeus :beingi-removed.

. .The Vobject of :the fpresentinvention ,fiskto overcome any chance. of finisiirewithitlie complished.- by placingfafhardenedacoinbiisti ble or iexplosive Vclosing element at the end ofuthe. fus'efsuch fas indicated at 4.- VlThe closa wrong timingy or --a imisrc, :only causes @considerable flesse of Y v, time but often proves rdangerous fasA rthey 1 Y ignite while the ing .element is formed v*with afstopper -to'fit intoitheiendfoffthe fuse.-and 'acap adapted l to't-over the ,end offthe fuseftheaexterior of rthe .cap .-.being rounded or vlsemi-spherical.

The enlargement of the cap with relation toi the bore of:the:fuserwliich-.contains tlierlofose ig-powder, increases the explosive volume of explosive surface from which the explosion the fuse but `also *increasesV ofv powder at the vendy of the fuse f surface Vof the cap providesfthe maximumV Y.

' Y`95 of the fusetakes place. The closing element Y -f the. cap engages the to such an eXtent that the spittinfforce' of the fuse is considerably intensified. For the purpose of protecting the explosive stop-Vvv 'A Vper 4 and the fuse proper from4 moisture and alsoV to protectit againstaccidental break age or removal from the end ofV the fuse, it

fiio

RiviA,`.Ass1Givon .To nnmnivrnnncrnmnnsn 'end forming a cap portion for has been found advantageous to dip the fuse in paraffin or like material to form a waterproof coating or covering such as indicated at 5.

While the fuse plug and intensifier is here shown as used in connection with an electrical fuse spitter, it is obvious that it may be applied to the end of any ordinary fuse. I also wish it understood that the spitting end of the fuse may be capped or plugged with any other explosive material suitable for the purpose.

The materials and finish of the several parts of the invention may be such as the judgment and experience of the manufacturer may dictate.

I wish it understood that various changes in form, proportions and minor details of construction may be resortedto within the scope of the appended claims and that I do not wish to limit myself to the specific design and construction here shown.

Having thus described my invention, what I claim and desire to secure by Letters Patent is- 1. As an article of manufacture, a fuse having a recess, a powder filling in said recess, and an intensifying explosive member comprising a stopper tting in said recess and having an enlarged outer end forming a cap for the fuse.

2. As an article of manufacture, a fuse having a recess, a powder lling in said recess, and a hardened intensifying explosive member comprising a stopper portion fitting in said recess and having an enlarged outer the fuse.

3. As an article of manufacture, a fuse having a recess, cess, an intensifying explosive member comprising a stopper portion fitting in said recess and having an enlarged outer end form- Copes of this patent may a powder filling in said re-A ing a cap for the fuse, and means for holding said member in position.

4. As an article of manufacture, a fuse having a recess, a powder filling in said recess, an intensifying explosive member comprising a stopper portion fitting in said recess and having an enlarged outer end forming a cap for the fuse, and a waterproof covering for holding said member in position.

5. As an article of manufacture, a fuse having a recess, a powder filling in said recess, and an explosion intensifying member having a diameter greater than that of the recess to extend across the end thereof and form a closure for the recess.

6. As an article of manufacture, a fuse having a recess, a powder filling in said recess, an intensifying explosive member having a diameter greater than that of the recess to extend across the end thereof and form a closure therefor, and a protective covering for holding said member in position. i

7. As an article of manufacture, a fuse having a recess, a powder filling in said recess, Vand an explosion intensifying member for the end of the fuse comprising a stopper portion and a cap portion.

8. As an article of manufacture, a fuse having a recess, powder loosely filling said recess, and a relatively compact intensifying member for the end of the fuse comprising a stopper portion and a cap portion.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

FRANK BERNARDI.

Witnesses:

B. F. GooDE,

AGNES M. HANSEN.

be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, .D. C. 

